Question

Find the first term $a$ and the common difference $d$ of A.P. : $-5,-1,3,7,.....$

Answer 1

Given A.P.-

$-5,-1,3,7,.....$

From the given A.P.

First term $a=-5$

Common difference $d=a_2-a_1=(-1)-(-5)=4$

Hence the first term and common difference of the given A.P. is $-5$ and $4$ respectively.